I was in a similar situation like 2 year ago. Im 18 now with a stutter and can assure u that basically not giving a fck abt it is enough. Idk ur situation fully but i used to be lonely at the first year of highschool, but then decided to do smth abt it so i tried to socialize more and getout of my comfort zone to get to know more people. Which made me pretty popular in the school at the time and had wonderful high school years. Anyways overcoming a stutter doesn't happen in a day. Its a process that starts from not letting the stutter define u as a person.